Liquid-fuel burner or atomizer



R E Z T M O T A R R O E R V E 21B L E c w D T- ,U Q I L 5. 2 9 1 .Rw 2 ,.n P A Filed July 50, 1924 f@ ww NN N m o .N5 o m R n N. NN KN ,w d Y Q [nuenlf' 610172654* Zalm??v y zum; up 3L/im;

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Patented Apr.` 28, 1925.

coRNELIs vzULvnn, orv LoNDoN, ENGLANn.

LIQUID-rum BURNER on Afromzna.

Application filed July 30,

To all whom t 'may-concern.' 4

Be it known that I, CORNELIS ZULvER, engineer, a. subject of the Queen of the Netherlands, of St. Helens Court, Great St., Helens, in the city of London, England, have invented a new and useful Improvement in or Relating to Liquid-Fuel Burners or Atomizers, of which the following is a'speciication. j

:The object of this invention is to provide an improved liquid fuel burner or atomizer of the type wherein mechanically operated atomizers are employed and to dispense with the ordinary filters, high pressure heaters and pumps which are at present used for liquid fuel burners of thel ordinary type working under the-directpressure system.

A further object is to so arrange the improved burner that pulverized fuel may be fed thereto instead ofxthe oil or together therewith as vcircumstances mayrequire.

- through the burner. 'In the improved One type of burner has been proposed wherein the oil is atomized by a device mechanically driven by an external motor or the like and consisting of av rotar cup into which the oil is fed the delivery e ge of said cup being arranged within the l'exit of a surrounding air nozzle.

In another type of burner oil is discharged from the open ornozzle end of an oil supply tube on to a freely mounted lfan like atomizer rotated by the blast of air passing burner the oil fuel in passing through the oil supply tube .is subjected therein to 'the action of a rotary spindle passing longitudinally through the oil tube and driven by an external motor or other source of power, and the oil onleaving theopen end or nozzle of the oil supply tube is subjected to the mechanical beating action of blades mounted on the end ofsaid power driven spindle beyond the opln endl or nozzle of the said oil supply tu e.

The said power driven spindle miiy be fitted at suitable points in its length as well as at, the 'end with blades or like devices v adapted to break up and .discharge the oil together with any impurities which may come from the supply and thereby avoid the clogging of the burner. y

The spindle may be mounted on ball or roller bearings. p

The oil is fed by gravity or pressure from a tank where it is heated approximately to l 1924. Serial No. 729,161.

its fiash point by meansv of suitable steam vcoils or otherwise as required.

The outlet end of the oil tube may be rflared outwardly or contracted inwardly or fitted with any suitable form of nozzle.

The accompanying drawing is a sectional elevation showing "one construction of the improved oil burner fitted to a furnace front.

In the construction illustrated an oil supply tube a preferably tapered towards its discharge end is fitted with a rotary spindle b which extends longitudinally and centrally through the horizontal outlet end portion of said tube and passes out through the rear wall thereof where ball bearings c are provided. l

The rotary spindle b projects beyond the open or discharge end of the oil tube a and is fitted with a series of blades b adapted to mechanically atomize the oil which issues from the oil tube, the outlet from which is of such dimensions as to freely pass any impurities in theoil.

The said oil tube or nozzle a is enclosed in an air supply pipe d and the spindle b is extended rearwardly and passes out through the rear wall of the said air tube where ball bearings d and a suitable stuffing box d2 are provided. The spindle b is driven by means o-f an electric moto-r e suitably supported and preferably coupled'to a fan f,

' so that the said motore ma be employed not only for driving the sai spindle b but also the fan f which supplies air under pressure to the tube d.

The air supply tube a3 extends forwardly TENT OFFICE;

so as to discharge into the furnace and is ico g', g2, g3, a series of openings h', h2, h3 or the like are provided in the entrance chamber walls. A

The interior of the air supplytube d is fitted with converging cones z y', the first z' located in front of the oil tube aand the other j located further forward and beyond a lateral opening 7c by which solid pulver- -ized fuel ma be admitted to and drawn through the air tube j by induction and discharged into the furnace. p

In operation oil is fed to the oil. supply.

' the fan f. The atomizing action is enhanced by the series'of cones i j in the air tubes d and the additional air cones g g2 g3 surrounding the nozzle end thereof.

Air supplied by fan f may be heated in any suitable manner, for example, by passing the supply pipe through a casing formed in the furnace front, thereby utilizin heat which would-otherwise be lost by ra iation, or any other convenient manner for heating the air may be employed.

. Ifit is desired to'admit pulverized solid fuel with the atomized oil the inlet 7c is connected to a suitablemeceptaele' containing the pulverized Solid .fuel which is drawn into and forced through the burner by induction. When not employed for the admission of pulverized solid fuel the inlet-7c may be closed or used as an additional air inlet.

Under certain circumstances where it is necessary or desirable totemporarily feed the furnace with pulverized solidfuel alone the oil jet may be Shut off or steam or air may be supplied through the oil pipe to assist in the injection of the pulverized solid fuel and air into the furnace. The improved burner thus lends itself to ready conversion from oil firing to firing with pulverized fuel or both as required.

'The improved burner may be fitted to an ordinary fire door and arranged to Work with forced or natural draught as desired.

The burner spindle may revolve at from 1,000 to 4,000 revolutions per minute, more or less as may be found most suitable.

What I claim as my invention and desire to secure by Letters Patent is l. A fuel burner comprising the combination o-f an oil nozzle, an air pressure chamber surrounding said oil nozzle, said air chamber extending forwardly of said nozzle and converging toward its forward end, an oil atomizer mounted at the forward end of said oil nozzle, said atomizer extending rearwardly through said oil nozzle and air \chamber, anti-friction bearings mounted in said oil nozzle and said air chamber, means for mechanically turning said atomizer, and a plurality of converging air chambers adapted to regulate air to be mixed with said oil. 'f

2. A fuel burner comprising an oil nozzle, an air chamber Surrounding said oil nozzle, a rotatable atomizer mounted in said oil nozzle and adapted to spray the oil in said air chamber, means for rotating said atomizer, and a plurality of converging telescoping air chambers for controlling the combustion of oil passing therethrough.

3. A fuel burner comprising an oil supply pipe, an air supply chamber, an atomizer positioned Within said oil pipe, said atomizer having a rotatable shaft, a pair of anti-friction. bearings for said sha t, one of said bearings being mounted in said oil supply pipe and the other of said bearings mounted in the outer wall of said air supply chamber, a plurality of atomizing blades mounted on said shaft and adapted to rotateA therewith, and a plurality of air controlling chambers through which the atomized oil is adapted to pass.

4. A fuel burner comprising an oil supply pipe, an air pressure chamber surrounding said pipe, a rotatable atomizer mounted within said oil pipe, said atomizer extending rearwardly through said oil pipe and said air chamber, means for rotating said atomizer, la pulverized fuel chamber surrounding the forward end of said air chamber, said pulverized fuel chamber having a converting forward end, and a plurality of mixing chambers mounted forwardly of sald pulverized fuel chamber for controlling the air 'content of the fuel passing therethrough.

5. A fuel burner comprising an oil supply section and a solid fuel supply section,

said oil section having mechanical atomizing means for atomlzing the oil, an air pressure chamber surrounding said atomizer, an

air Vand oil mixing chamber mounted forwardly of said atomizer, said mixing chamber having tapering walls, said sohd fuel supply section comprising a s upply pipe and a mixing chamber, said mlxing chamber substantially enclosing the tapering Walls of said oil mixing chamber and adapted to mix the atomized oil with said so id fuel, and a series of air chambers for regulating the air admitted into the furnace.

6. A fuel burner comprising an oil nozzle, an4 air nozzle surrounding said oil nozzle, rotatable atomizing means mounted within said oil nozzle, means for rotating said atomizer, air controlling means mounted rearwardly of said air nozzle for regulating the amount of air to be mixed With the atomized oil, and a plurality of partially telescoping air chambers for regulating the admission of air into the furnace.

7. A fuel burner comprising an oil nozzle, an air nozzle, a solid fuel'nozzle, said oil nozzle being mounted within said air nozzle, rotatable atomizing means mounted' in said oil nozzle for atomizing the oil passing therethrough, an air supply valve for regulating the air in said air nozzle, said valve being positioned rearwardly of said air nozzle, said solid fuel nozzle surrounding the forward end of said air nozzle and adapted to mix the solid fuel with the atomized oil, and a series of converging., air chambers mounted forwardly of said solid fuel noz` zle for regulating the air admitted to the furnace with said fuel mixture.

8. A fuel burner comprising the combina` tion of an oil nozzle, a rotatable atomizer in saidnozzle, means for rotating said atom- -1zer, an a1r nozzle surroundlng said 011 nozzle, and an air supply valve for regulating the air-entering said air nozzle, a fan for supplying air under pressure to"said air nozzle, a solid fuel vnozzle adapted to receive the forward end of said air nozzle therein for mixing the atomized oil and air with the solid fuel, a plurality of air regulating chambers for controlling the airvadmitted to the furnace with said fuel mixture, and means for mounting the device in a I'furnace door opening.

9. A fuel'burner comprising an oil nozzle, a rotatable atomizer in said nozzle, uneans for rotatlng sald -nozzle, an air nozzle adapted to mix air with the atomized oil, controlling means for determiningr the amount of air to be mixed with the atomized oil, a solid fuelv nozzle mounted forwardly of said air nozzle-and adapted to receive the air and atomizedoil therefrom for mixing with the solid fuel, a plurality of air passages mounted forwardly of said solid fuel nozzle, a flange mounted about said solid fuel nozzle and extending outwardly therefrom, and a plate for holding the flange in adjusted position within the furnace door opening.

10. A fuel burner comprising an oil nozzle, rotatable atomzing means mounted on said oil nozzle, means for rotating said atomizing means, an air nozzle surrounding said oil nozzle, air pressure means' for supplying air to the air nozzle under pressure, valve means for regulating the pressure of the air, a second fuel nozzle adapted to receive the atomized oil and air for mixture, a series of converging air regulating chambers for controlling the air admitted to the furnace with said fuel mixture, and means for mounting the' device in a furnace door opening.

CORNELIS ZULVER. 

